When plant cells make food, they transform into

Carbon dioxide into energy

Explanation:

Plants are autotrophs and prepare their own food through the process of photosynthesis. During the process of photosynthesis, plants utilizes, carbon dioxide and water in the presence of sunlight and produce energy and oxygen.

Plants cell during photosynthesis, uses carbon dioxide and transform it into energy in the form of glucose and releases oxygen.

Hence, the correct answer is "Carbon dioxide into energy".

your answer would be “dry”